Patent US2587975A successfully refreshed from Google Patents.
US2587975A
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US
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Apparatus for forming cylindrical shapes
Assignee: Republic Steel Corp
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Filing: 1949-06-14
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Granted: 1952-03-04
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Expires: 1969-06-14
Abstract
No abstract record available.
Inventors
- 👤 Frederic M Darner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:44
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/14; B60; B60K; B60K17/00; B60K17/04; B60K17/16; B60K17/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE226686C
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US104527A
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US807352A
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US1245827A
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DE339345C
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US1742056A
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US2410603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |